Iterative
The waterfall Project Management model is a skeleton for system development. It advances consecutively through a succession of phases, preliminarily with system feasibility analysis and concluding up to system release and maintenance.
rad model is used when there is a time constraint............ this model is suitable for big projects where the customer requirements are clear
A waterfall model would be a good approach for that type of project.
Not necessarily. If the kinds of software they develop are similar, then having a single process model can be a good idea. If they are involved in a wide variety of types of development projects then some models might be more suited to some projects than others. A company needs to be flexible. So they may be able to classify the types of projects they do and apply the appropriate model to a particular type.
There are 2 main methods of software modeling · Predictive(e.g.waterfall) - Good when requirements are well understood and have low technical risk. · Adaptive(e.g.spiral) - Good when requirements and needs are uncertain. High technical risk In a failure - In a predictive LC it will be expensive because we get to know the failure after finishing everything but in adaptive LC only an iteration is wasted. There several phases in the waterfall model a. Planning b. Requirements c. Specification (b and c together we call analysis) d. Design e. Implementation f. Maintenance This is called a Functional Decomposition and also a top down approach (Where we see from above and identify the big picture first and then go in to higher details) In the waterfall model, before going to the next phase we have to freeze the previous step (no turning back). This is good when we have a good understanding about the project at the beginning. But iterative models gives us more flexibility through giving chance to revisit early phases. Spiral model is a adaptive model. This is an adaptive SDLC that cycles over and over again through development activities until project is complete. Here we go through some major steps, 1. Plan 2. Analyze and Design 3. Construct prototype 4. Test and integrate These steps iterate till completion of the project. This is also can be viewed as a divide and conquer approach. In first few iterations complex or risky parts of the system are handled.
Agile Development process
When we are talking about a big project we Use Water fall model. Water fall model has total of five stages.
The evolutionary model is an iterative software development approach where the project is divided into small incremental builds. Each build is developed and delivered to the client in short cycles, allowing for feedback and changes to be integrated throughout the development process. This model is suitable for projects with evolving requirements and where it is difficult to determine all the requirements at the beginning.
specialized process model is a combination of both component based development model (CBD) and formal method model
The waterfall Project Management model is a skeleton for system development. It advances consecutively through a succession of phases, preliminarily with system feasibility analysis and concluding up to system release and maintenance.
Production Support Process Model
rad model is used when there is a time constraint............ this model is suitable for big projects where the customer requirements are clear
A waterfall model would be a good approach for that type of project.
A linear process model is a sequential approach to project management or system development where each phase follows a specific order, often resembling a straight line. It typically involves stages such as planning, execution, testing, and closure, with each stage depending on the completion of the previous one. This model is straightforward and easy to understand, making it suitable for projects with well-defined requirements. However, it may lack flexibility, as it does not easily accommodate changes once a stage is completed.
The incremental model is a software development approach where the project is divided into smaller increments or iterations. Each iteration delivers a portion of the final product, allowing for incremental development and testing. The spiral model is a risk-driven approach where the project is divided into multiple phases, with each phase including risk analysis and mitigation. The spiral model combines elements of both iterative development and waterfall model, allowing for flexibility and risk management throughout the project lifecycle.
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